Fountain pen



FIG. 1 is a right side elevational view of a fountain pen showing my newdesign, the left side view being a mirror image thereof;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view in an exploded condition;

FIG. 5 is a rear elevational view in an alternative exploded condition;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom plan view thereof.

The ornamental design for a fountain pen, as shown and described.